//+------------------------------------------------------------------+
//|                                                       MaxMin.mq5 |
//|                                  Copyright 2026, Niquel Mendoza. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, Niquel Mendoza."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
bool Fast(const vector& X, vector& out)
 {
//---
  const ulong fs = X.Size();
  double max = -DBL_MAX, min = DBL_MAX;
  out.Resize(fs);
  for(ulong i = 0; i < fs; i++)
   {
    const double v = X[i];
    out[i] = v;

    //---
    if(v < min)
      min = v;
    if(v > max)
      max = v;
   }

//--- check std
  double diff = max - min;
  if(diff < DBL_EPSILON)
    return false;

//--- inv
  diff = 1.0 / diff; // inversa

//--- final
  out -= min;
  out *= diff;
  return true;
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
bool Normal(const vector &X, vector &out)
 {
  const ulong n = X.Size();
  if(n == 0)
    return false;

//---
  const double max = X.Max();
  const double min = X.Min();

//--- check std
  double diff = max - min;
  if(diff < DBL_EPSILON)
    return false;

//--- inv
  diff = 1.0 / diff; // inversa

//--- final
  out = X - min;
  out *= diff;
  return true;
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
vector Ran()
 {
  vector v(1000);
  for(int i = 0; i < 1000; i++)
   {
    v[i] = (double)MathRand();
   }
  return v;
 }
 
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
 {
//---
  MathSrand(10);
  double vs = 0.0;

  ulong a = GetMicrosecondCount();
  for(int i = 1; i < 100000; i++)
   {
    vector v = Ran();
    Normal(v, v);
    vs += v[0];
   }
  ulong b = GetMicrosecondCount();

  Print("native: ", (b - a), " vs : ", vs);

  vs = 0.0;
  MathSrand(10);

  a = GetMicrosecondCount();
  for(int i = 1; i < 100000; i++)
   {
    vector v = Ran();
    Fast(v, v);
    vs += v[0];
   }
  b = GetMicrosecondCount();

  Print("fast: ", (b - a), " vs : ", vs);

 }
//+------------------------------------------------------------------+